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Simultaneous multiband optical follow-up observations of a gamma-ray flare in BL Lacertae

文献类型：期刊论文

作者Chang, X3; Xiong DR(熊定荣)1; Liu, Chenxu3; Xu, J R4; Bhatta, G6; Yi, T F2,5; Zhang J(张嘉)1; Pan, Y3; Zou, X Z3; Chen, X L3
刊名MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
出版日期2026-05
卷号548期号:1
关键词galaxies: active BL Lacertae objects: general BL Lacertae objects: individual (2200+420) galaxies: photometry
ISSN号0035-8711
DOI10.1093/mnras/stag501
产权排序第2完成单位
文献子类Article
英文摘要On 2024 October 5, BL Lacertae ( 2200 + 420 ) experienced one of its brightest gamma-ray flares. We conducted simultaneous follow-up observations in the u , v , g, r, i, and z bands from 2024 October 17 to November 21 using the Mephisto telescope and its two 50 cm twin auxiliary photometric telescopes of Yunnan University. Intraday variability (IDV) was detected in the g, r, i, and z bands. The IDV duty cycle increased with observing frequency across these bands. The shortest variability time-scale, derived from autocorrelation analysis, constrains the upper limit of the black hole mass to be M center dot less than or similar to 10(8.29) M( (R) )assuming a Kerr black hole, and M center dot less than or similar to 10(8 . 77) M- (R) assuming a Schwarzschild black hole. The emission region responsible for the observed variability has a size of R-H <= 3 . 51 & times; 10( 14 )cm and is located at a distance of RH <= 2 . 83 & times; 10( 15) cm from the central supermassive black hole. This distance is approximately three orders of magnitude smaller than the typical radius of the broad-line region, indicating that the emission region lies well within it. A general bluer-when-brighter trend was detected on intraday time-scales, suggesting that shock-accelerated relativistic electrons enhance the high-energy particle population, leading to spectral hardening. A potential quasi-periodic oscillation with a period of similar to 100.77 min was detected with > 99 . 99 per cent confidence, consistent with predictions from the magnetic reconnection model. These observed optical intraday variabilities and colour variations of BL Lacertae can be well explained by the turbulent jet model.
学科主题天文学 ; 天体物理学 ; 高能天体物理学 ; 星系与宇宙学
URL标识查看原文
出版地GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND
WOS关键词ACTIVE GALACTIC NUCLEUS ; QUASI-PERIODIC OSCILLATIONS ; BLAZAR S5 0716+714 ; BLACK-HOLE MASSES ; POLARIZATION VARIABILITY ; INTRADAY VARIABILITIES ; COMPLETE SAMPLE ; LIGHT CURVES ; RADIO ; MICROVARIABILITY
资助项目National Key Research and Development Program of China[2024YFA1611603]; Yunnan Key Laboratory of Survey Science[202449CE340002]; Yunnan University Development Plan for World-Class University; Yunnan University Development Plan for World-Class Astronomy Discipline; National Natural Science Foundation of China[11863007]; National Natural Science Foundation of China[12063005]; National Natural Science Foundation of China[12063007]; National Natural Science Foundation of China[11703078]; Yunnan Province Foundation[2019FB004]; Program for Innovative Research Team (in Science and Technology) in University of Yunnan Province (IRTSTYN); Yunnan Local Colleges Applied Basic Research Projects[2019FH001-12]; China Manned Space Project[CMS-CSST-2021-A0]; Yunnan Revitalization Talent Support Programme[202005AB160002]; Yunnan Revitalization Talent Support Programme[202105AE160021]; Yunnan Revitalization Talent Support Programme[202305AT350002]; Polish Ministry of Science[RID/SP/0050/2024/1]
WOS研究方向Astronomy & Astrophysics
语种英语
WOS记录号WOS:001734917400001
出版者OXFORD UNIV PRESS
资助机构National Key Research and Development Program of China[2024YFA1611603] ; Yunnan Key Laboratory of Survey Science[202449CE340002] ; Yunnan University Development Plan for World-Class University ; Yunnan University Development Plan for World-Class Astronomy Discipline ; National Natural Science Foundation of China[11863007, 12063005, 12063007, 11703078] ; Yunnan Province Foundation[2019FB004] ; Program for Innovative Research Team (in Science and Technology) in University of Yunnan Province (IRTSTYN) ; Yunnan Local Colleges Applied Basic Research Projects[2019FH001-12] ; China Manned Space Project[CMS-CSST-2021-A0] ; Yunnan Revitalization Talent Support Programme[202005AB160002, 202105AE160021, 202305AT350002] ; Polish Ministry of Science[RID/SP/0050/2024/1]
版本出版稿
源URL[http://ir.ynao.ac.cn/handle/114a53/29104]  
专题云南天文台_双星与变星研究组
通讯作者Xiong DR(熊定荣); Liu, X W
作者单位1.Yunnan Observatories, Chinese Academy of Sciences, 396 Yangfangwang, Guandu District, Kunming 650216, P. R. China;
2.Key Laboratory of Colleges and Universities in Yunnan Province for High-energy Astrophysics, Department of Physics, Yunnan Normal University, Kunming 650500, P. R. China;
3.South – Western Institute for Astronomy Research, Yunnan Key Laboratory of Survey Science, Yunnan University, Kunming, Yunnan 650504, P. R. China;
4.CAS Key Laboratory of Space Astronomy and Technology, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100101, P. R. China;
5.Guangxi Key Laboratory for the Relativistic Astrophysics, Nanning 530004, P. R. China;
6.Janusz Gil Institute of Astronomy, University of Zielona Góra, ul. Szafrana 2, PL-65-516 Zielona Góra, Poland;
7.Department of Astronomy, School of Physics and Astronomy, Yunnan University, Kunming 650091, P. R. China
推荐引用方式
GB/T 7714		 Chang, X,Xiong DR,Liu, Chenxu,et al. Simultaneous multiband optical follow-up observations of a gamma-ray flare in BL Lacertae[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2026,548(1).
APA Chang, X.,熊定荣.,Liu, Chenxu.,Xu, J R.,Bhatta, G.,...&Liu, X W.(2026).Simultaneous multiband optical follow-up observations of a gamma-ray flare in BL Lacertae.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,548(1).
MLA Chang, X,et al."Simultaneous multiband optical follow-up observations of a gamma-ray flare in BL Lacertae".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 548.1(2026).

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